What are functional requisites? List and discuss the five functional requisites

Functional requisites are the major tasks that society must fulfill if it is to survive. The five functional requisites include:
 
(1) replacing members;
(2) socializing new members;
(3) producing and distributing goods and services;
(4) preserving order; and
(5) providing a sense of purpose. Some of these requisites are self-explanatory.

A society must replace its members to perpetuate itself. Without socialization, a society would be in chaos. People need basic resources and a means to share them. There must be a means to defend a society, both from within and from foreign invaders. Finally, without purpose, society would be consumed by self-interest and would seed its own destruction.